#!/usr/bin/env python
# -*- coding: utf-8 -*-
a=100
if a >= 0:
    print(a)
else:
    print(-a)

PI = 3.1415926
print(PI)

t1 = '大蟒蛇'
t2 = t1.encode('utf-8')
print(t2)

print(len(t1))

t3 = 'Hello, %s' % 'world'
print(t3)

students = ['a','b','c']
print(students)

students.append('d');
print(students)

for item in students:
    print(item)

sum = list(range(10))
print(sum)

dict = {'Michael': 95, 'Bob': 75, 'Tracy': 85}
print(dict)
print(dict['Bob'])
print(dict.get('Tracy'))